Crank-pin-turning machine



H. STREIBER.

CRANK PIN TURNING MAGHINE.

No. 457,960. Patented Aug. 18, 1891.

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I UNITED STATES PATENT OFFICE.

HILBERT STREIBER, OF OIL CITY, PENNSYLVANIA.

CRANK-PlN-TURNING MACHINE.

SPECIFICATION forming part of Letters Patent No. 457,960, dated August18, 1891. Application filed December 22,1890. Serial No. 375,475. (Nomodel.)

.are to provide a machine of simple construction provided with a centralrotatable bush in g carrying the tool-box spindle and adapted to beconnected to the spokes of wheels by means of bolts located parallelwith the crankpin. I attain these objects by the construc-,

tion illustrated in the accompanying drawings, in which Figure 1 is alongitudinal section of the device attached to the spokes of a wheel.Fig. 2 is a transverse section on line mac of Fig. 1. Fig. 3 is a frontview of the power-lever.

In said drawings, A represents the frame of the machine, which ispreferably made of cast-iron,and has two lugsA arranged on oppositesides of the center of said frame. Said lugs have slots at to receiveone end of bolts L that have their opposite ends adjustably secured bymeans of nuts to a slotted clampplate L, located against the inner sideof the wheel-spoke H so that the retaining-bolts are made to passbetween the spokes of said wheel in a direction parallel with thecrankpin H of the wheel. The center portion of the frame A has acylindrical perforation, within which is placed a cast-metal bushing B,having a central cylindrical opening B large enough to receive thecollar of the crank-pin. The bottom of the opening B is closed and has acentral screw-tapped perfo ration, having in engagement therewith ascrew G, the pointed end of which is received in the centering-hole inthe end of the cranlc pin, while the opposite end is locked by means ofa jam-nut g thereon bearing against the face of the bushing. The screw Ghas a head 9 by which its pointed end can be made to engage with thecentering hole of the crank-pin.

The bushing B has a cylindrical perforation therethrough parallel withthe central opening B and within said perforation is placed the steelspindle 0, having at one end thereof, preferably integral therewith, thetool-holder E, which has therein the cuttingtool 6, adjustably retainedby means of the screw 6 pressing against the rear end thereof. Thespindle O is prevented from rotating upon its own axis, as it carries afeather c, that is also received in a groove formed in the bushing B.

To advance the tool-holder and its cuttingtool along the surface of thecrank-pin H, while the tool-holder is made to travel around saidcrank-pin by rotating the bushing B, the spindle Cis hollowand its innerend is screwthreaded and has in engagement therewith a screw D, upon theouter end of which is socured the belt-wheel I by means of the nut 11upon said outer end and a pin t passing through the hub of said beltwheel and through the screw. To prevent any length wise motion of thescrew, it has integral therewith a collar d, against which is placed ahousing m, that is secured to the bushing B, and as the hub of thebelt-wheel I also abuts against the housing the latter prevents anylengthwise motion of the screw in either direction. Endwise motion ofthe bushing B is also prevented by its collar 1) at one end and by thehousing m and the inner part of the power-lever K at the other end. Saidlever K is secured to the bushing B, and has upon its outer end aspindle 7t, upon which is loosely mounted a pulley 76 having an axialhandle it and said pulley is connected by means of a belt J with thebelt-wheel I, so that when feeding or advancing the cuttingtool thehandle must be held firmly in the hand to prevent rotation. The belt canbe either straight or crossed, according to the direction in which it isdesired to advance the cutting-tool. By this construction eithercrank-pins with collars or collarless crankpins can be turned with ease,and said crankpins may be of any length by using the bolts L of anysuitable length. As the bushingB is substantially the only part that isrotated,

but little power is required to operate the machine, and as thecutting-tool is straight there is no springing thereof, and consequentlya perfectly cylindrical form can be given to the crank-pin.

Having now fully described my invention, I claim- 1. In acrank-pin-turning machine, the combination of the frame having twoslotted lugs, a clamp-plate L, parallel with said lugs, and boltsadjustably uniting said plate L to said slotted lugs, a bushing B,central within the frame, a tool-holder-carrying spindle passingeccentrically through said bushing, a screw within said spindle, andmeans to rotate said bushing, substantially as described.

2. The combination of the frame A and means, as described, for securingit to a crankpin wheel, a bushing B, central within said frame, a toolholder, its spindle passing through said bushing, a screw within saidspindle and provided with a collar, a housing m, embracing said screwand its collar, a band-wheel upon the end of the screw, a p0wer-leversecured to the central bushing, and means to rotate the band-wheel,substantially as described.

In testimony whereof Iaflix my signature in presence of two witnesses.

HILBERT STREIBER. Witnesses:

C. G. STRANGE, F. W. HAYS.

